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Letteratura scientifica selezionata sul tema "Porous Media Combustion"

Autore: Grafiati

Pubblicato: 16 novembre 2024

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Articoli di riviste sul tema "Porous Media Combustion"

1

Kamal, M. M., e A. A. Mohamad. "Combustion in Porous Media". Proceedings of the Institution of Mechanical Engineers, Part A: Journal of Power and Energy 220, n. 5 (11 luglio 2006): 487–508. http://dx.doi.org/10.1243/09576509jpe169.

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2

Wang, Fei, Xueming Li, Shuai Feng e Yunfei Yan. "Numerical Study on the Characteristics of Methane Hedging Combustion in a Heat Cycle Porous Media Burner". Processes 9, n. 10 (28 settembre 2021): 1733. http://dx.doi.org/10.3390/pr9101733.

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With the rapid development of portable devices and micro-small sensors, the demand for small-scale power supplies and high-energy-density energy supply systems is increasing. Comparing with the current popular lithium batteries, micro-scale burners based on micro-thermal photoelectric systems have features of high power density and high energy density, the micro-scale burner is the most critical part of the micro-thermal photovoltaic system. In this paper, the combustor was designed as a heat cycle structure and filled with porous media to improve the combustion characteristics of the micro combustor. In addition, the influence of the porous media distribution on the burner center temperature and wall temperature distribution were studied through numerical simulation. Furthermore, the temperature distribution of the combustor was studied by changing the porous media parameters and the wall parameters. The research results show that the heat cycle structure can reduce heat loss and improve combustion efficiency. When the combustion chamber is filled with porous media, it makes the radial center temperature rise by about 50 K and the temperature distribution more uniform. When filling the heat cycle channel with porous media the wall temperature can be increased. Finally, the study also found that as methane is combusted in the combustor, the temperature of the outer wall gradually increases as the intake air velocity increases. The results of this study provide a theoretical and practical basis for the further design of high-efficiency combustion micro-scale burners in the future.

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3

Cao, H. L., J. N. Zhao, K. Zhang, D. B. Wang e X. L. Wei. "Diffusion Combustion Characteristics of H₂/Air in the Micro Porous Media Combustor". Advanced Materials Research 455-456 (gennaio 2012): 413–18. http://dx.doi.org/10.4028/www.scientific.net/amr.455-456.413.

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In order to improve thermal to-electric energy conversion efficiency of the micro gas turbine power generation system, a novel micro porous media combustor is designed and experimental investigation on the H2/air diffusion combustion is performed to obtain its combustion characteristics. High efficiency diffusion combustion of H2/air can be stabilized in the very wide operating range, especially at higher excess air ratio. Exhaust gas temperature is markedly improved and meanwhile heat loss ratio is evidently decreased. Moreover, in the certain operating ranges, the greater the combustion thermal power and excess air ratio, the smaller heat loss of the micro combustor will be. The micro porous media combustor should be a preferred micro combustor for developing the micro gas turbine power generation system.

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Wang, Fei, Xueming Li, Shuai Feng e Yunfei Yan. "Influence of Porous Media Aperture Arrangement on CH4/Air Combustion Characteristics in Micro Combustor". Processes 9, n. 10 (29 settembre 2021): 1747. http://dx.doi.org/10.3390/pr9101747.

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Micro-electro-mechanical systems (MEMS) occupy an important position in the national economy and military fields, and have attracted great attention from a large number of scholars. As an important part of the micro-electromechanical system, the micro-combustor has serious heat loss due to its small size, unstable combustion and low combustion efficiency. Aiming at enhancing the heat transfer of the micro-combustor, improving the combustion stability and high-efficiency combustion, this paper embedded porous media in the combustor, and the effects of different parameters on the combustion characteristics were numerically studied. The research results showed that the layout of porous media should be reasonable, and the small and large pore porous media embedded in the inner and outer layers, respectively, can bring better combustion performance. Meanwhile, A: 10–30 has a high and uniform temperature distribution, and its methane conversion rate reached 97.4%. However, the diameter ratio of the inner layer to the outer layer (d/D) of the porous medium should be maintained at 0.4–0.6, which brings a longer gas residence time, and further enables the pre-mixed gas to preheat and burn completely. At a d/D of 0.5, the combustor has the highest outer wall temperature and CH4 conversion efficiency. Besides, compared with the pore size increasing rate of Δn = 10 PPI and Δn = 10 PPI, the radial temperature distribution of the Δn = 10 PPI combustor is more uniform, meanwhile avoids the occurrence of local high temperature. Under the condition of Δn = 10 PPI, A: 20–30 layout maintains excellent thermal and combustion performance. In addition, the lean flammable limits of MC-U20, MC-10/30-0.8, and MC-20/30-0.5 were compared, at an inlet velocity of 0.5 m/s, the corresponding lean flammable limits are 0.5, 0.4, and 0.3, respectively, among them MC-20/30-0.5 has a wider flammable limit range, showing excellent combustion stability. This research has guiding significance for the combustion stability of the micro combustor.

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Newburn, E. Ryan, e Ajay K. Agrawal. "Liquid Fuel Combustion Using Heat Recirculation Through Annular Porous Media". Journal of Engineering for Gas Turbines and Power 129, n. 4 (21 gennaio 2007): 914–19. http://dx.doi.org/10.1115/1.2719259.

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A counter-flow annular heat recirculating burner was designed for lean prevaporized, premixed combustion. Prior to entering the combustor, the reactants are passed through a porous media-filled preheating annulus surrounding the combustor. Kerosene is dripped by gravity onto the porous media and vaporized by the heat conducted through the combustor wall. Experiments were conducted to evaluate heat transfer and combustion performance at various equivalence ratios, heat release rates, and inlet air temperatures. Results show low CO emissions over a range of equivalence ratios. NOx emissions were high at high heat release rates, indicating inadequate prevaporization and premixing of fuel with air. Heat recirculation and heat loss characteristics are presented at various operating conditions.

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da Mota, J., W. Dantas e D. Marchesin. "Combustion Fronts in Porous Media". SIAM Journal on Applied Mathematics 62, n. 6 (gennaio 2002): 2175–98. http://dx.doi.org/10.1137/s0036139999347816.

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7

Wu, Jian, Bo Li, Bin Xu e Jia Xuan Miao. "Experimental Research on Combustion and Emission Performance for Micro Combustor of MTPV System with Stratified Porous Media". Advanced Materials Research 608-609 (dicembre 2012): 934–40. http://dx.doi.org/10.4028/www.scientific.net/amr.608-609.934.

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As the critical component of the system, micro-combustor requires a high and uniform temperature distribution along the wall to meet demands for the band gap of the PV cells. The past experiments have proved that the peak wall temperature of the combustor with porous media increases obviously. This paper will have a research on stratified porous media to enhance the combustion efficiency of the combustor and reduce the emissions.

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Weclas, Miroslaw. "Potential of Porous-Media Combustion Technology as Applied to Internal Combustion Engines". Journal of Thermodynamics 2010 (21 febbraio 2010): 1–39. http://dx.doi.org/10.1155/2010/789262.

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The paper summarizes the knowledge concerning porous media combustion techniques as applied in engines. One of most important reasons of this review is to introduce this still not well known technology to researchers doing with internal combustion engine processes, thermal engines, reactor thermodynamics, combustion, and material science. The paper gives an overview of possible applications of a highly porous open cell structures to in-cylinder processes. This application means utilization of unique features of porous media for supporting engine processes, especially fuel distribution in space, vaporization, mixing with air, heat recuperation, ignition and combustion. There are three ways for applying porous medium technology to engines: support of individual processes, support of homogeneous combustion process (catalytic and non-catalytic) with temperature control, and utilization of the porous structure as a heat capacitor only. In the first type of application, the porous structure may be utilized for fuel vaporization and improved fuel distribution in space making the mixture more homogeneous in the combustion chamber. Extension of these processes to mixture formation and ignition inside a combustion reactor allows the realization of a homogeneous and a nearly zero emissions level combustion characterized by a homogeneous temperature field at reduced temperature level.

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9

Kaviany, Massoud. "MODELING OF COMBUSTION IN POROUS MEDIA". Annual Review of Heat Transfer 9, n. 9 (1998): 219–68. http://dx.doi.org/10.1615/annualrevheattransfer.v9.60.

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ALDUSHIN, A. P., e B. J. MATKOWSKY. "Driven Combustion Waves in Porous Media*". Combustion Science and Technology 156, n. 1 (luglio 2000): 221–50. http://dx.doi.org/10.1080/00102200008947304.

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Più fonti

Tesi sul tema "Porous Media Combustion"

1

Lawson, D. A. "Combustion in porous media". Thesis, University of Oxford, 1985. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.354839.

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2

Byrne, Helen M. "Modelling combustion zones in porous media". Thesis, University of Oxford, 1991. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.291095.

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3

Ochi, Fumihiro, e Kazuhiro Yamamoto. "Soot accumulation and combustion in porous media". Maney Publishing, 2006. http://hdl.handle.net/2237/20054.

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Takada, Naoki, e Kazuhiro Yamamoto. "LB simulation on soot combustion in porous media". Elsevier, 2006. http://hdl.handle.net/2237/20044.

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5

Pedersen-Mjaanes, Haakon. "Hydrogen production from rich combustion inside porous media". Thesis, University of Cambridge, 2006. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.614189.

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6

Henneke, Michael Ray. "Simulation of transient combustion within porous inert media /". Digital version accessible at:, 1998. http://wwwlib.umi.com/cr/utexas/main.

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ZANONI, M. A. B. "Smoldering Combustion In Porous Media Kinetic Models For Numerical Simulations". Universidade Federal do Espírito Santo, 2012. http://repositorio.ufes.br/handle/10/4161.

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Made available in DSpace on 2016-08-29T15:32:55Z (GMT). No. of bitstreams: 1 tese_5423_Dissertação_Marco_Aurelio_B_Zanoni_05_03_2012.pdf: 18602750 bytes, checksum: 72079deefb882e9a0b68fad2493b88dc (MD5) Previous issue date: 2012-03-05
Tecnologias avançadas para a geração de energia usando combustíveis não convencionais xisto betuminoso e seu semi-coque, areias betuminosas, petróleo extra-pesado e biomassa proveniente de resíduos sólidos urbanos e de lodo de esgoto - têm em comum processos termoquímicos compostos de complexas reações químicas. Este trabalho trata da formulação e otimização de mecanismos químicos normalmente envolvidos na pirólise do xisto betuminoso e na combustão do xisto betuminoso e seu semi-coque. Problemas inversos (usando o algoritmo de Levenberg-Marquardt) foram empregados para minimizar o erro entre os valores estimados e os dados de termogravimétria para os mecanismos de reação de 3 passos para a pirólise do xisto betuminos, e mecanismos de 4 e 3 passos para o xisto betuminoso e seu semi-coque, respectivamente. Os parâmetros cinéticos, tais como ordem de reação, fator pré-exponencial, energia de ativação e os coeficientes estequiométricos que afetam a secagem, as reações de oxidação, pirólise e descarbonatação foram estimadas com sucesso. Além disso, os erros estatísticos e residuais foram avaliados, resultando em um valor razoável para todas as estimativas e o mecanismo cinético proposto e estimado para a combustão do semi-coque foi aplicado em um código em meios porosos. Um estudo paramétrico entre o perfil de temperatura e a velocidade do ar, e o perfil de temperatura e a concentração de carbono fixo foi desenvolvido. Este estudo mostra que o perfil de temperatura é extremamente influenciado por estes parâmetros, confirmando que a propagação da frente é controlada pela injeção de O2. Palavras-chave: Xisto Betuminoso, Semi-Coque, Pirólise, Combustão, Estimação de Parâmetros, Problemas Inversos, Levenberg-Marquardt, Meios Porosos.

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Pastore, Andrea. "Syngas production from heavy liquid fuel reforming in inert porous media". Thesis, University of Cambridge, 2010. https://www.repository.cam.ac.uk/handle/1810/237704.

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In the effort to introduce fuel cell technology in the field of decentralized and mobile power generators, a hydrocarbon reformer to syngas seems to be the way for the market uptake. In this thesis, a potential technology is developed and investigated, in order to convert commercial liquid fuel (diesel, kerosene and biodiesel) to syngas. The fundamental concept is to oxidise the fuel in a oxygen depleted environment, obtaining hydrogen and carbon monoxide as main products of the reaction. In order to extend the flammability limit of hydrocarbon/air mixtures, the rich combustion experiments have been carried out in a two-layer porous medium combustor, which stabilises a flame at the matrix interface and recirculates the enthalpy of the hot products in order to enhance the reaction rates at ultra-rich equivalence ratio. This thesis demonstrates the feasibility of the concept, by exploring characteristic parameters for a compact, reliable and cost effective device. Specifically, a range of equivalence ratios, thermal loads and porous materials have been examined. n-heptane was successfully reformed up to an equivalence ratio of 3, reaching a conversion efficiency (based on the lower heating value of H2 and CO over the fuel input) up to 75% for a packed bed of alumina beads. Thermal loads from P=2 to 12 kW at phi=2.0 demonstrated that heat losses can be reduced to 10%.Similarly, diesel, kerosene and bio-diesel were reformed to syngas in a Zirconia foam burner with conversion efficiency over 60%. The effect of different burners, thermal loads and equivalence ratios have also been assessed for these commercial fuels, leading to equivalent conclusions. A preliminary attempt to reduce the content of CO and hydrocarbons in the reformate has been also performed using commercial steam reforming and water-gas shift reaction catalysts, obtaining encouraging results. Finally, soot emission has been assessed, demonstrating particle formation for all the fuels above phi=2.0, with biodiesel showingthe lowest soot formation tendency among all the fuels tested.

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Koester, Garold Eugene. "Propagation of wave-like unstabilized combustion fronts in inert porous media /". The Ohio State University, 1997. http://rave.ohiolink.edu/etdc/view?acc_num=osu1487943341527809.

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Mbarawa, M., NA Kakutkina e Korzhavin AA. "Experimental investigation on peculiarities of the filtration combustion of the gaseous fuel-air mixtures in the porous inertia media". Journal of Mechanical Science and Technology, 2007. http://encore.tut.ac.za/iii/cpro/DigitalItemViewPage.external?sp=1000859.

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This study investigates peculiarities of the filtration combustion (FC) of the gaseous fuel-air mixtures in a porous inertia media (PIM). Combustion wave velocities and temperatures were measured for hydrogen-air, propane-air and methane-air mixtures in the PIM at different mixture filtration velocities. It is shown that the dependences of the combustion wave velocities on the equivalence ratio are V-shaped, It was further confirmed that the FC in the PIM has more contrasts than similarities with the normal homogeneous combustion. One of the interesting observations in the present study, which is not common in normal homogenous combustion, is the shifting of the fuel-air equivalent ratio at the minimum combustion wave velocity from the stoichiometric condition (¢ = 1). For a hydrogen-air mixture, the fuel-air equivalence ratio at the minimum combustion velocity shifts from the stoichiometric condition to the rich region, while for the propane-air and methane-air mixtures the fuel-air equivalence ratio at the minimum combustion velocity shifts toward fuel-leaner conditions. The measured maximum porous media temperatures in the combustion waves are found to be weakly dependent on the mixture filtration velocities. In general, the effects of the mixture filtration velocities on the measured maximum porous media temperatures are not significant.

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Libri sul tema "Porous Media Combustion"

1

Ermolaev, Boris. Convective burning and low-velocity detonation in porous media. Lancaster, Pennsylvania: DEStech Publications, Inc., 2019.

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Capitoli di libri sul tema "Porous Media Combustion"

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Ene, Horia I., e Dan Poliševski. "Underground Combustion". In Thermal Flows in Porous Media, 147–72. Dordrecht: Springer Netherlands, 1987. http://dx.doi.org/10.1007/978-94-009-3717-8_5.

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2

Weclas, Miroslaw. "Porous Media in Internal Combustion Engines". In Cellular Ceramics, 580–95. Weinheim, FRG: Wiley-VCH Verlag GmbH & Co. KGaA, 2006. http://dx.doi.org/10.1002/3527606696.ch5j.

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Byrne, H. "Travelling Combustion Waves in Porous Media". In European Consortium for Mathematics in Industry, 99–102. Wiesbaden: Vieweg+Teubner Verlag, 1992. http://dx.doi.org/10.1007/978-3-663-09834-8_15.

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da Mota, J., W. Dantas e D. Marchesin. "Traveling Waves for Combustion in Porous Media". In Hyperbolic Problems: Theory, Numerics, Applications, 177–87. Basel: Birkhäuser Basel, 1999. http://dx.doi.org/10.1007/978-3-0348-8720-5_20.

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Liou, May-Fun, e HyoungJin Kim. "Pore Scale Simulation of Combustion in Porous Media". In Computational Fluid Dynamics 2008, 363–74. Berlin, Heidelberg: Springer Berlin Heidelberg, 2009. http://dx.doi.org/10.1007/978-3-642-01273-0_46.

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Mishra, Niraj Kumar, P. Muthukumar e Snehasish Panigrahy. "A Review on Clean Combustion Within Porous Media". In Energy, Environment, and Sustainability, 209–24. Singapore: Springer Singapore, 2017. http://dx.doi.org/10.1007/978-981-10-7185-0_12.

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Delalić, N., E. N. Ganić e M. Likić. "Experimental Study on Combustion in a Porous Media". In New and Renewable Technologies for Sustainable Development, 529–39. Boston, MA: Springer US, 2002. http://dx.doi.org/10.1007/978-1-4615-0296-8_42.

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Johansen, C., e G. Ciccarelli. "Combustion in a horizontal channel partially filled with porous media". In Shock Waves, 209–14. Berlin, Heidelberg: Springer Berlin Heidelberg, 2009. http://dx.doi.org/10.1007/978-3-540-85168-4_32.

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de Neef, M., P. Knabner e G. Summ. "Numerical Bifurcation Analysis of Premixed Combustion in Porous Inert Media". In Lecture Notes in Computational Science and Engineering, 39–50. Berlin, Heidelberg: Springer Berlin Heidelberg, 1999. http://dx.doi.org/10.1007/978-3-642-60155-2_4.

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Gilot, P., F. Marcuccilli e G. Prado. "Porous Media and the use of Thermobalances: The Kinetics of Combustion Processes". In NATO Science Series E: (closed), 329–39. Dordrecht: Springer Netherlands, 1994. http://dx.doi.org/10.1007/978-94-011-1182-9_24.

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Atti di convegni sul tema "Porous Media Combustion"

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Amano, Ryo, e Krishna Guntur. "Porous Media Combustion for Heating Process". In 10th AIAA/ASME Joint Thermophysics and Heat Transfer Conference. Reston, Virigina: American Institute of Aeronautics and Astronautics, 2010. http://dx.doi.org/10.2514/6.2010-4894.

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2

Janvekar, Ayub Ahmed, M. Z. Abdullah, Z. A. Ahmad, Aizat Abas, Ahmed A. Hussien, Musavir Bashir e Qummare Azam. "Assessment of porous media burner for surface/submerged flame during porous media combustion". In ENGINEERING INTERNATIONAL CONFERENCE (EIC) 2016: Proceedings of the 5th International Conference on Education, Concept, and Application of Green Technology. Author(s), 2017. http://dx.doi.org/10.1063/1.4976884.

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Karad, Vinay, e Vaibhav Arghode. "Investigation of High Thermal Intensity Porous Media Combustion in a Reverse Flow Combustor". In ASME 2023 Gas Turbine India Conference. American Society of Mechanical Engineers, 2023. http://dx.doi.org/10.1115/gtindia2023-118360.

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Abstract A small-scale (6.25 kW) reverse flow combustor with different fillings of porous media is explored to examine the effect on combustion behaviour, lean operational limit, and NOx, CO emissions. Premixed mixture of reactants is supplied to the combustor. Silicon carbide foam is used as the porous media. The investigation parameters include pore density of the porous media, reactant mixture injection diameter, and the volume occupied by porous media in the combustor. Combustor without porous media is also included in the study for comparison. The combustor is operated at high thermal intensity of 39 MW/m3-atm. Combustion is stabilized in the porous media as observed from its glow. Similar NOx and lower CO emission levels were obtained for the case with porous media. The results highlight the effectiveness of ceramic porous media in achieving stable combustion and low pollutant emissions at high thermal intensity applicable to gas turbine engines.

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Dahifale, Balasaheb S., Ramkumar N. Parthasarathy e Subramanyam R. Gollahalli. "Experimental Investigation of Porous-Media Combustion Characteristics of Biodiesel Blends". In ASME 2010 International Mechanical Engineering Congress and Exposition. ASMEDC, 2010. http://dx.doi.org/10.1115/imece2010-37527.

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The use of porous-media burners in air-heating systems, gas turbine combustors, and steam generators is a potential method to reduce pollutant emission levels. Biofuels, such as canola methyl ester (CME), are an attractive alternate energy resource; however, pure biofuels have lower energy content than petroleum-based fuels. Therefore, the combustion characteristics of blends of Jet A and CME were studied in a porous-media burner. Two silicon carbide coated carbon-carbon matrix porous media of square section were used. The upstream porous medium with a pore size of 8 pores per centimeter (20 pores per inch) served as the evaporation porous medium; the downstream porous medium with a pore size of 31 ppcm (80 ppi) was used as the combustion porous medium. The CME-Jet A fuel blends were injected from an air-blast atomizer into a coflow of hot air, which entered the evaporation porous medium. The combustion characteristics of three blends (volume percentages of CME equal to 25%, 50% and 75%) were studied at four different initial equivalence ratios. The global pollutant emissions, axial temperature profiles and the radiative heat fraction of the flame downstream of the combustion porous medium were measured. The results indicated that for lean air-fuel mixtures, the addition of CME to Jet A resulted in a reduction of the CO emission index. However, the NOx emission index was increased with the CME content in the blend for a given equivalence ratio. Also, the maximum flame temperature increased with equivalence ratio. In general, it was found that the porous-media burner was useful in reducing emissions and controlling flame temperatures.

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Barajas, Pablo E., R. N. Parthasarathy, S. R. Gollahalli e Kambiz Vafai. "Combustion Characteristics of Biofuels in Porous-Media Burners". In POROUS MEDIA AND ITS APPLICATIONS IN SCIENCE, ENGINEERING, AND INDUSTRY: 3rd International Conference. AIP, 2010. http://dx.doi.org/10.1063/1.3453804.

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Hui Liu, Wenzhong Chen e Benwen Li. "Combustion of industrial gas in porous media burner". In 2011 Second International Conference on Mechanic Automation and Control Engineering (MACE). IEEE, 2011. http://dx.doi.org/10.1109/mace.2011.5987373.

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Akkutlu, I. Yücel, e Yannis C. Yortsos. "The Dynamics of Combustion Fronts in Porous Media". In SPE Annual Technical Conference and Exhibition. Society of Petroleum Engineers, 2000. http://dx.doi.org/10.2118/63225-ms.

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Kovalnogov, Vladislav N., Tamara V. Karpukhina e Yuri E. Chamchiyan. "Investigation of diffusion during combustion in porous media". In INTERNATIONAL CONFERENCE OF COMPUTATIONAL METHODS IN SCIENCES AND ENGINEERING ICCMSE 2022. AIP Publishing, 2024. http://dx.doi.org/10.1063/5.0193210.

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Newburn, E. Ryan, e Ajay K. Agrawal. "Liquid Fuel Combustion Using Heat Re-Circulation Through Annular Porous Media". In ASME Turbo Expo 2005: Power for Land, Sea, and Air. ASMEDC, 2005. http://dx.doi.org/10.1115/gt2005-68588.

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A counter-flow annular heat recirculating burner was designed for lean pre-vaporized, premixed combustion. Prior to entering the combustor reactants are passed through a porous media-filled preheating annulus surrounding the combustor. Kerosene is dripped by gravity onto the porous media and vaporized by the heat conducted through the combustor wall. Experiments were conducted to evaluate heat transfer and combustion performance at various equivalence ratios, heat release rates, and inlet air temperatures. Results show low CO emissions over a range of equivalence ratios. NOx emissions were high at high heat release rates, indicating inadequate pre-vaporization and premixing of fuel with air. Heat recirculation and heat loss characteristics are presented at various operating conditions.

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10

Tarokh, A., A. A. Mohamad e L. Jiang. "Non-Premixed CH4 Combustion in a Porous Medium". In ASME 2009 International Mechanical Engineering Congress and Exposition. ASMEDC, 2009. http://dx.doi.org/10.1115/imece2009-12945.

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Abstract (sommario):

Combustion process is the major contributor to the air pollution, such as CO, unburned hydrocarbon, soot and NOx, etc. Porous media can be a good candidate for improving the combustion efficiency and reducing pollution formation. Premixed combustion has been extensively investigated in the literature, experimentally and computationally. However, investigation of non-premixed combustion in porous media is limited in the open literature, which is the topic of this paper. The present work deals with the numerical modeling of methane/air non-premixed combustion in porous media. Physical problem that is considered here is fuel jet which is injected to the air in free flame case and injected into a porous medium, in the porous medium combustion case. The flow is assumed turbulent and standard k-ε model with standard wall functions is used in the simulation. The solid porous structure is assumed to be composed of alumina fiber material with temperature dependent heat conductivity. Discrete Ordinate method is used to solve radiative transport equations. The governing equations are solved using finite volume method. The results show that the combustion in porous media has superior combustion efficiency and significantly lower NOx and CO emissions compare to the free flame. This is due to the lower maximum temperature in porous media combustion. In comparison with the free flame case where the combustion zone is narrow and long, the results shows the combustion zone in porous media is shorter in axial and wider in radial direction.

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Rapporti di organizzazioni sul tema "Porous Media Combustion"

1

Dillon, J. Combustion in porous media. Office of Scientific and Technical Information (OSTI), settembre 1999. http://dx.doi.org/10.2172/765956.

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2

Sathe, S. B., R. E. Peck e T. W. Tong. Combustion and heat transfer in porous media. Office of Scientific and Technical Information (OSTI), giugno 1990. http://dx.doi.org/10.2172/6284523.

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3

Akkutlu, I. Yucel, e Yannis C. Yortsos. The dynamics of combustion fronts in porous media. Office of Scientific and Technical Information (OSTI), giugno 2000. http://dx.doi.org/10.2172/756596.

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4

Lu, Chuan, e Y. C. Yortsos. A Pore-Network Model of In-Situ Combustion in Porous Media. Office of Scientific and Technical Information (OSTI), gennaio 2001. http://dx.doi.org/10.2172/773827.

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5

Akkutlu, I. Yucel, e Yanis C. Yortsos. The Effect of Heterogeneity on In-Situ Combustion: The Propagation of Combustion Fronts in Layered Porous Media. Office of Scientific and Technical Information (OSTI), giugno 2002. http://dx.doi.org/10.2172/795238.

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6

Akkutlu, I. Yucel, e Yanis C. Yortsos. Non-Adiabatic Effects on Combustion Front Propagation in Porous Media: Multiplicity of Steady States. Office of Scientific and Technical Information (OSTI), marzo 2002. http://dx.doi.org/10.2172/792462.

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